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1. 发明授权

US5233645A Automatic power breaking circuits for communication equipments 失效
标题翻译：自动断电电路，用于通讯设备
公开(公告)号：US5233645A
公开(公告)日：1993-08-03
申请号：US780365
申请日：1991-10-22
申请人： Gak J. Choi , Ho Y. Kim , Young I. Kim , Kyung H. No , Ki H. Kim
发明人： Gak J. Choi , Ho Y. Kim , Young I. Kim , Kyung H. No , Ki H. Kim
IPC分类号： H02H1/00 , H04B1/16 , H04B7/26 , H04M1/73
CPC分类号： H04W52/0241 , Y02B60/50
摘要： An automatic power breaking circuit for a communication equipment, for breaking automatically electric power in the communication equipment when the communication equipment does not perform transmission and reception for talk. The present circuit comprises a call processing tone detector 1 connected to a receiving stage of the communication equipment, for detecting a plurality of predetermined tones provided from a switch board of an exchange, a JK flip-flop 2 connected to said call processing tone detector 1, for receiving a source voltage, a talk terminal 4 for receiving said source voltage and being manually switched to an ON state by the user when transmission or reception is required, a D flip-flop 6 connected to said talk terminal 4, an AND gate 7 connected to output terminals of said JK flip-flop 2 and D flip-flop 6, and a transistor 8 connected to an output terminal of said AND gate 7w for switching power being supplied to a transmitting stage of the communication equipment. In accordance with the present invention, an unnecessary loss of the electric power in the communication equipment can be prevented, so that the life span of a charging battery contained therein and the portable communication period of time can be lengthened, and the power supply can be miniaturized.
摘要翻译：一种用于通信设备的自动断电电路，用于当通信设备不进行通话的发送和接收时，在通信设备中自动断电。本电路包括连接到通信设备的接收级的呼叫处理音检测器1，用于检测从交换机的交换板提供的多个预定音调;连接到所述呼叫处理音检测器1的JK触发器2 用于接收源电压的通话终端4，用于接收所述源电压并且在需要发送或接收时由用户手动切换到ON状态的通话终端4，连接到所述通话终端4的D触发器6，AND门 7连接到所述JK触发器2和D触发器6的输出端子，以及晶体管8，其连接到所述与门7w的输出端子，用于切换供给到通信设备的发送级的电力。根据本发明，可以防止通信设备中的电力的不必要的损失，使得其中容纳的充电电池的使用寿命和便携通信时间段可以被延长，并且电源可以是小型化。

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